[A case of bladder carcinoma representing leukemoid reaction].

A 60-year-old male with locally invasive bladder carcinoma (pT4 pNo Mo) had a remarkable leukocytosis of 64,900/mm3 in the peripheral blood count without any findings of inflammatory disease. The grade 3 transitional cell carcinoma (TCC) measuring 60 by 58 mm involved the prostate, but radiological examinations including abdominal CT scan and isotopic bone scan failed to prove distant metastasis. Serum calcium level was within normal level. Negative bone marrow finding for leukemia strongly suggested a leukemoid reaction by the bladder carcinoma. Preoperative arterial chemoembolization utilizing mitomycin C microcapsules and cisplatin infused into the tumor feeding arteries provided a normalization of leukocyte count (8,200/mm3) in association with a substantial tumor reduction, and was followed by radical cystoprostatectomy. Although the leukocyte count maintained a normal range for 2 months postoperatively, leukocytosis recurred and rapidly progressed to a leukocyte count of 51,300/mm3. CT scan revealed intrapelvic tumor recurrence, and serum analysis for granulocyte colony stimulating factor (G-CSF) demonstrated an elevated value of 130.9 pg/ml (normal, less than 30 pg/ml). The patient is now on systemic chemotherapy. The laboratory data and the response to the treatments would indicate that the leukocytosis in this patient is a leukemoid reaction due to the bladder carcinoma which may release G-CSF. Ten cases of bladder tumor representing leukemoid reaction have been reported in the literature.